Danny (Adam Sandler) experienced a failed love affair when he was young. Feeling deeply deceived by women, he accidentally discovered the magic of wedding rings and pretended to be a married man to play around. Many years later, Danny was already a successful plastic surgeon. He met the beautiful girl Palmer (Brooklyn Decker) at a party, and the two fell in love overnight. When he woke up the next day, Palmer, who found the wedding ring, mistakenly thought Danny was married and said he wanted to withdraw from the complicated relationship. In order to retain the girl he liked, Danny had to make up lies again and begged the hospital assistant Catherine (Jennifer Aniston) to play the wife who was about to divorce him. It's just that the lies are rolling like a snowball, and Catherine's two children, Danny's brother Eddie and others are involved. When a group of people came to Hawaii for vacation and met Catherine's nemesis Devlin (Nicole Kidman), the out-of-control situation developed in an unexpected direction...